I want to help you understand the specifics of t-shirt fabric.
Lets start by briefly covering some of the basics.
Carded cotton. Carded thread is spun using the fewest steps allowing the garment manufacturer to pass the saving on to the consumer. Typically carded cotton tees will range in weight between a Medium Weight 5.0 oz to a heavyweight 6.1 oz , and we consider these tees to be standard quality.
Combed Cotton is a cleaning process that removes short cotton fibers and aligns longer cotton fibers producing a smooth cotton thread. Combed cotton thread is used in most premium quality tees. Like the Next Level 3600 and the Bella & Canvas 3001.
Ring spun Cotton is a spinning process that thins and strengthens normal carded cotton thread or premium combed cotton thread. As the thread is twisted it creates a thinner smoother thread. This thinner thread allows for a tighter fabric weave increasing the print-ability and hand of the cotton fabric.
Carded cotton tees will range in weight between a Medium Weight 5.0 oz to a heavyweight 6.1 oz , and we consider these tees to be standard quality.
Combed Ring spun cotton was typical is reserved for the lighter weight premium tees from Next Level, Alternative, and Bella and canvas, But in 2016 most of the major manufacturers like Anvil, Gildan, and Hanes started offering ringspun cotton in some of their mid range garments.